Page Comparison

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• "Boolean"

• "Number"
  

• "RegExp"

• "String"

• "Hex"

The following coercions are valid:

• Strings can be coerced to numbers (null if not parsableintegers or reals) and regular expressions. If the string is not parsable as a number, the result is null. The empty string parses as 0.
• Numbers can be coerced to strings. 
• Regular expressions can be coerced to strings.
• Any expression can be coerced to Boolean.
• null and false can be coerced to 0, and true can be coerced to 1
• Hex values must match the regex /^[A-F0-9]+$/

An error is thrown for other attempted coercions, unless the value being coerced by as() is already of the target type.

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doesnotexist.defaultsTo(x);  // returns the value of x
doesnotexist.defaultsTo([]); // returns the empty array
doesnotexist.defaultsTo([], "doesnotexist was null"); // returns the empty array and writes a message to log

The operator is most often used to guard against null values.

encode()

The encode() operator returns a string containing the JSON representation of the data structure to which it is applied. For example:

The encode() operator takes an optional positive integer argument specifying that the object should be pretty printed (if it contains or is a map or array) with newlines and indents with that number of spaces.

isnull()

The isnull() operator returns true of the object is null (undefined) and false otherwise.

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The typeof() operator returns the type of the object to which it is applied. The return value is one of the strings that may be passed to as(), or one of the other following values:

• "Array"

• "Map"

• "Null"

• "Hex"

For example:

nums = [1, 2, 3]
nums_type = nums.typeof() // nums_type = "Array"

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